Die head



R. E. HYDE Aug. 8, 1933.

DIE HEAD Filed Feb. 28 1931 2 Sheets-Sheet 1 xx INVENTOR.

Ra 1 2); 6 flyde 0 r a Way/ w ATTORNEY. ,3;

Aug. 8, 1933. R E. H 1,921,754

DIE HEAD Filed Feb. 28, 1931 2 Sheets-Sheet 2 INVENTOR.

, Ralf/1 6. flyde BY A TTORNEY. a,

Patented Aug. 8, 1933 V 1,921,754

UNITED STATES PATENT OFFICE;

1,921,754 DIE HEAD Ralph E. Hyde, Cleveland, Ohio, assignor to The IOster Manufacturing Company, Cleveland,

Ohio, a Corporation of Ohio Application February 28, 1931. Serial No.519.093 4 Claims. (01. 10-96) The present invention relates to, adie-head, to slide in the slots The shank 7 'fits snugly andparticularly to a die-head of the. general in a hole. 6 inj the rearedge'of the chaser body type disclosed in the patent to Oster No. 5, asshown in Fig. 2; Thechasers flarehere 1,044,808. shown as fitted withdetachable cutter blades 5',

Among the objects of the present invention The grooves 6 are formed inan annular cam' are to provide a die-head of the character deplate 8mounted on the outersurface of. the die scribed which has improvedfeatures making for carrier 2, concentric therewith, and engagingincreased accuracy, eiiiciency and readiness .of against annular rabbetsin the rear face of the application and removal. Another object is theflange-like member 3. This cam plate 8 is kept provision of a die-headparticularly adapted for from sliding rearwardly by a fiat-ring 9suitably 6 use on a rotating machine, particularly of the fastened tothe rear outer edge of the outlet 3. semi-automatic or automatic type.It will thus be seen that the plate 8 is capable Further objects of theinvention will appear ofrotation around the die carrier 2, butnot offrom the following description. translation therealong.' An arcuateplate 10" is 1 It is to be understood that thedescription and fi t d bya ridge a ro v other Suitable 7 the accompanying drawings areillustrative of ar Cohehtric W t 0am plate preferred means ofaccomplishing the purposes of to a portion of the cam plate'B, beingsecured, the invention, but that these are tolbe taken thereto by meansof a nut 12 and stud 12'. as examples and not as limitations. Theinvenarcllatefilot also concentric W the 89 1 tion is'capable of beingapplied in a variety or p ate, pe relative movement e l o mechanicalforms, the inventive scope being inp a s 0 a a y-particular setting b id dicated by the claims, by tightening the nut 12. Suitable index marksIn the drawings, Fig. 1 is a frontelevation of s h a 1 n th pl 8 n 0 pmi any the improved die-head, certain features being'predeterminedsetting between these plates to be 5. omitted for the sake,of simplicity; Fig. 2 is a q y and accurately made- 3 central verticallongitudinal section through the T p at 10 is of L Shapedcross sectionas die-head, the back plate being omitted; Fig, 3 seen in Fig. 2, withthe foot .of the L extending illustrates a detail of the adjustingmeans; Fig. a Short stance. above the top of die carrier 4 is aperspective view of the chaser pin shown h l p ted therefrom bya fiatshifter ring;

: in Fig. 2; Fig. 5 illustrates a cam slot used in 5. A ca ve 6 nds d aal y througnggf the shifter ring; Fig. 6 is a front view correspondtheunder face of the plate lolchangihg to an g ing to Fig. 1 butillustrating a modified construcaxial direction for a. short distancenear. the tion; Fig. 7 is a view on the line 7- '7 of Fig. 6; from end h3 -'5 to prevent rota-, Fig. 8 is a partial front view looking in theditiOhi the 0am P "when the chasers are view of the setting means on alarger scale; Fig. Of a Stud 18 g d n-the tip n the ring 9 is a sectionthrough the shifter ring on the line 15. The stud and groove mayconveniently have 9--9 of Fig. '7; and Fig.10 is a partial plan view aball-and-notch detent. to maintainthe organialso on the line-9-9 of Fig.7 but .With the shifter zation in position, all as indicated in Fig. 2.

rin e v d d pa t of thodie i b o The shifter ring 15 is keyed on theoutside of away. 7 the carrier 2, t'hus being movable axially but.not-Referring W to Figs- 1, 2 and 3, the P circumferentially of the carrier,thus moving the l 0115 is seen to cfmsist of a Q 1 f stud'l8'circumferentially"a distance equal to the tubular die Garner 2 throughWhlch the pipe 9 circumferential component of the groove 16, and othercylindrical work to be threaded'passes in l v th 1 er This die carrierha a flange so opening or closing the Chasers eusua mann s a in ,1 likeenlargement 3 at the rear within suitable To move the rmg 15 ax ayiialong the am Garner recesses 4 of which chasers 5 are carried, beinga fsu1tab.1g F -P p movable on radial lines by the action of spiral nVen1ent arrangement a,shlfter e fi cam grooves 6 which engage pins 7 on thechasers Gated m l 2 by n s g- 105 to move the latter. The pins 7, asbest shown in ,olrcumferentlal groove asrshPwn 1n the 3 15, Fig. 4,consist of a cylindrical shank 7 a short and o e a 20. By m o som henlarged cylindrical head l flconcentric upon one Chasers yb moved fromthen 111111051? h end of the shank, and a guide fin '7 curved ,onoutmost pos tio ahy given Setting W ut it the, radiusof the slots 6 andof proper thickness bein sa y Q S op. h ta fimfi t q r. r

. rection of the arrow 8, Fig. '1, showing a front o s s grooveisentered y the upp n 0'- step by step by suitable mechanism, not shown.

The above mechanism is a usual attachment for die heads and is not initself a feature of the. present invention.

With reference to Figs. 6 to 10 inclusive, the apparatus may be modifiedto comprise a tubular die carrier 32 having a ring-shaped cam plate 33mounted upon the front end of 32- and concentrically with respect to theaxis of the opening through 32. This cam is being held in place by anannular cover plate 34. The cover plate includes four quadrantallyplaced radial channels35 which form guides for the chasers 36. Inwardlydirected arcuate fins 37 are formed on the front face of the cam plate33 and engage slots 38in the rear edges of the chasers, whereby rotationof the cam plate moves the chasers in and out radially.

Rotation of the cam plate is accomplished by a stud 4O upstanding froman arcuate plate 41 which is secured by a bolt 42, clamping bushing 43and nut44 to the cam. ring 33. The plate 41 has a ridge and groovesliding contact with the cam ring 33 and may bemoved circuinferentiallywith respect therewith when the clamping elements'43 and 44 areloosened. The extent of this travel is. governed bythe length of anarcuate slot 45 in the plate 41, the relationship being substantiallythe same as that existing between the cam ring 8 and the plate 10 inFig. 2.

The upstanding stud 49 projects througha slot 46 in the outer surface 47of the die carrier 32,

the die carrier being suitably enlarged as shown in theupper part ofFig.2 to receive the adjusting mechanism just described. The clampingbushing 43 has an enlarged head 48 which islevel at the top with theouter rear surface 47. This head :48 carries an index mark 49, Fig. 10,which may be brought opposite any one of a series of graduations 50 onthe upper surface 47. When the ring 52 ismoved to the right in Fig. 7,the graduations 50 are exposed.

Motion of-the cam plate to move the chasers 36 in or out after anydesired adjustment has been set, is accomplished by a shifter ring 52movable axially along the die carrier 32 but keyed thereto as at 53preventing relative rotation. This shifter ring is inwardly grooveddiagonally as at 54, the groove 54-having a short axially directedsection55 at one end, into which groove the stud 40 projects. Axialmovement of the ring 52 thus causes a limited circumferential movementofthe stud 40 thus moving the cam plate. The stud '49 may conveniently beprovided with a ball-and-springdetent cooperthat the movement of ashifter yoke opens or closes the chasers within the predeterminedsetting limits. By the use of a ring type of shifter yoke it is possibleto open or close the chasers while the entire assembly is rotatingsothat these forms of head are particularly adapted to semi automatic orautomatic machines, it being-necessary to stop the machine only forchanges in adjustment.

It will be understood that the scope of the invention is not limited tothe two forms herein shown and described but that the principles may beembodied in other mechanisms, the scope of the invention beingdetermined by the following claims.

What I claim is:

1. In combination with a die head, a longitudinally disposed body, anannular cover plate on one end of said body, radially disposed. hollowribs on said cover plate, chasers reciprocably mounted within said ribs,cam engaging elements in said chasers, a cam ring mounted rotatablywithin the limits of said body and behind said cover plate, means forpreventing axial motion of said cam ring, a concentric arcuate platemounted on said cam ring, means for selectively clamping said arcuateplate fast to said cam ring or for permitting relative circumferentialmotion between the two, a shifter ring mounted upon and between the endsof said longitudinal body,

key connections between said longitudinal body and said shifter ringpermitting axial but preventing circumferential relative motion betweenthe two, cam connections between said arcuaite plate and said shifterring, said cam connections having both axial and circumferential,components.

2. A die head comprising in combination a laterally extending body, anannular cam plate corresponding to the cam surfaces on said'cam ringslot.

3. A die head comprising in combination a tubular body, 'a rotatable camplate within the axial dimension of said body, chasers radially movableby said cam plate, a radial projection upon said cam plate through theside of said body, and a shifter ring surrounding said body axiallymovable thereon but not therebeyond, an inward cam groove onsaid ringengaging with said radial projection, whereby movement of said ringaxially rotates said cam plate.

4. A die'head'compr-ising in combination a tubular body, a rotatable camplate within the axial dimension of said body, chasers radiallymovableby saidcam plate, a radial projection upon said cam plate throughthe sideofsaid body, means carried by said cam plate housed within andprojecting axially rearwardly of said body for adjusting said radialprojection, and a shifter ring surrounding said bodyaxially movablethereon but not therebeyond, an inward cam groove on said ring engagingwith said radial projection, whereby movement of said ring axiallyrotates said cam-plate.

1 RALPH E. "HYDE.

